Diaphragm Hydro Pneumatic Tanks

DWT Product Series

Overview

Product Series Description

ELBI TOP-PRO®tector Series of Hydro-pneumatic water well tanks represent the latest development in well tank technology and come with a true deep-drawn design with one single body weld which gives it reliability, lightness and efficiency.

There are no inner domes to limit the diaphragms expansion, therefore, the maximum drawdown can be obtained in all conditions. Top-Pro®tector type tanks feature Elbi exclusive Top-Pro® internal coating. Top-Pro® coating is tested against ASTM standards for perfect adhesion.

Features & Benefits

Diaphragm type design

Simple and reliable design.

Wide range of sizes available

From 2 to 119 gallons; we offer 10 different sizes to perfectly suit your application.

Heavy duty Butyl diaphragm

In house diaphragm manufacturing, using injection molding equipment, to ensure total control of this vital component. Proprietary food quality Butyl compound will not release taste or odor to water which makes it safe for alimentary applications. Solid construction, all diaphragms are QC inspected prior to assembly.

Exclusive TOP-PRO® corrosion proofing

Provides a high level of resistance against the corrosive action of water. *Completely phenol-free coating which satisfies government requirements for products designed to contain liquids for human consumption. Resistant to temperatures of up to 200°F.

Protection of water inlet

Plastic insert keeps the diaphragm safe, prevents well water debris from entering the tank.

Protected air valve

Recessed position prevents demage of the precharge air valve during shipping and handling. The plastic cap prevents accidental tampering.

Wide open steel base

Allows for an easy installation, does not limit tank position as in the case of closed based. Perfect for "T" installation in multiple tank set-up. The open style base provides better aeration, thus reducing condensation and premature rusting.*

Compact, light weight design

Space efficient design, replaces standard galvanized tanks up to three times as large; easy to handle and install.

* When installed in normal environmental conditions. By normal environmental conditions its is meant environments which are free of acids, scale or chemical deposits or other factors known to affect paints, coatings and metals.

Specifications

Packaging & Shipping Data

Model
Number

Packaging
Dimensions

Volume
(cu.ft.)

per Pallet

DWT-8

8.5×8.5×12.5

0.48

162

DWT-18

11x11x16.5

1.15

70

DWT-25

11x11x19

1.22

70

DWT-25H

11x12x19

1.30

70

DWT-50V

16.5×16.5×24

3.71

33

DWT-50H

16x16x23,75

3.90

24

DWT-80V

16.5×16.5×34

5.14

22

DWT-100V

20.3×20.3×32

7.37

10

DWT-150V

20.3×20.3×41

9.44

8

DWT-200V

24.3×24.3×41.5

14.28

8

DWT-300V

26.3×26.3×49.5

19.07

6

DWT-450V

31.3×31.3×53

28.94

3

DWT-500V

31.3×31.3×56.8

30.07

3

Available Drawdowns

Model

20-40

30-50

40-60

DWT-8

0.80

0.70

0.60

DWT-18

1.70

1.50

1.30

DWT-25

2.40

2.00

1.80

DWT-25H

2.40

2.00

1.80

DWT-50V

4.80

4.10

3.50

DWT-50H

4.80

4.10

3.50

DWT-80V

7.80

6.60

5.70

DWT-100V

9.70

8.20

7.10

DWT-150V

14.50

12.30

10.60

DWT-200V

19.40

16.40

14.20

DWT-300V

29.10

24.60

21.30

DWT-450V

43.60

36.90

31.90

DWT-500V

48.50

41.00

35.50

Selection Tables

Selection Tables

Maximum Pump Flow (gpm)

System Pressure Ranges

20-40

30-50

40-60

Minimum Run Time in Minutes

1

1.5

2

1

1.5

2

1

1.5

2

2.5

DWT-25**

DWT-50*

DWT-50V*

DWT-50V*

DWT-50V*

DWT-80V

DWT-50V*

DWT-50V*

DWT-80V

5

DWT-50V*

DWT-80V

DWT-100V

DWT-80V

DWT-100V

DWT-150V

DWT-80V

DWT-100V

DWT-150V

7

DWT-80V

DWT-150V

DWT-150V

DWT-80V

DWT-150V

DWT-200V

DWT-100V

DWT-150V

DWT-200V

10

DWT-100V

DWT-150V

DWT-200V

DWT-150V

DWT-200V

DWT-300V

DWT-150V

DWT-200V

DWT-300V

12

DWT-150V

DWT-200V

DWT-300V

DWT-150V

DWT-200V

DWT-300V

DWT-200V

DWT-300V

DWT-450V

15

DWT-200V

DWT-300V

DWT-300V

DWT-200V

DWT-300V

DWT-450V

DWT-200V

DWT-300V

DWT-450V

20

DWT-300V

DWT-300V

DWT-450V

DWT-300V

DWT-450V

DWT-500V

DWT-300V

DWT-450V

2xDWT-300V

25

DWT-300V

DWT-450V

DWT-500V

DWT-300V

DWT-450V

2xDWT-300V

DWT-450V

DWT-500V

2xDWT-450V

30

DWT-300V

DWT-500V

2xDWT-300V

DWT-450V

2xDWT-300V

2xDWT-450V

DWT-450V

2xDWT-300V

2xDWT-450V

*DWT-50V and DWT-50H have the same drawdown
**DWT-25 and DWT-25H have the same drawdown

Maintenance

It is recommended that a periodic maintenance inspection of the complete system be performed by a professional licensed plumber. The inspection should be done at least once a year and during such check, the tank’s precharge should be tested and adjusted to the correct pressure if necessary. Failure to comply will void the warranty we strongly recommend the use of dielectric union when connecting dissimilar metals.

Warranty

Elbi’s DWT series tanks are guaranteed to be free of workmanship or material defects for a period of 5 (five) years from the date of manufacturing. For a complete description of our warranty policy consult the literature which comes with the product or call our offices to request a copy.